[mirror_ubuntu-bionic-kernel.git] / kernel / trace / trace_stat.h

#ifndef __TRACE_STAT_H
#define __TRACE_STAT_H

#include <linux/seq_file.h>

/*
 * If you want to provide a stat file (one-shot statistics), fill
 * an iterator with stat_start/stat_next and a stat_show callbacks.
 * The others callbacks are optional.
 */
struct tracer_stat {
	/* The name of your stat file */
	const char		*name;
	/* Iteration over statistic entries */
	void			*(*stat_start)(struct tracer_stat *trace);
	void			*(*stat_next)(void *prev, int idx);
	/* Compare two entries for stats sorting */
	int			(*stat_cmp)(void *p1, void *p2);
	/* Print a stat entry */
	int			(*stat_show)(struct seq_file *s, void *p);
	/* Print the headers of your stat entries */
	int			(*stat_headers)(struct seq_file *s);
};

/*
 * Destroy or create a stat file
 */
extern int register_stat_tracer(struct tracer_stat *trace);
extern void unregister_stat_tracer(struct tracer_stat *trace);

#endif /* __TRACE_STAT_H */
Commit	Line	Data
002bb86d FW	1	#ifndef __TRACE_STAT_H
	2	#define __TRACE_STAT_H
	3
	4	#include <linux/seq_file.h>
	5
	6	/*
	7	* If you want to provide a stat file (one-shot statistics), fill
	8	* an iterator with stat_start/stat_next and a stat_show callbacks.
	9	* The others callbacks are optional.
	10	*/
	11	struct tracer_stat {
	12	/* The name of your stat file */
	13	const char *name;
	14	/* Iteration over statistic entries */
42548008	15	void (stat_start)(struct tracer_stat *trace);
002bb86d FW	16	void (stat_next)(void *prev, int idx);
	17	/* Compare two entries for stats sorting */
	18	int (stat_cmp)(void p1, void *p2);
	19	/* Print a stat entry */
	20	int (stat_show)(struct seq_file s, void *p);
	21	/* Print the headers of your stat entries */
	22	int (stat_headers)(struct seq_file s);
	23	};
	24
	25	/*
	26	* Destroy or create a stat file
	27	*/
	28	extern int register_stat_tracer(struct tracer_stat *trace);
	29	extern void unregister_stat_tracer(struct tracer_stat *trace);
	30
	31	#endif /* __TRACE_STAT_H */